Analysis of information sources in references of the Wikipedia article "Bivector" in English language version.
directional ellipse.
The terms axial vector and pseudovector are often treated as synonymous, but it is quite useful to be able to distinguish a bivector (...the pseudovector) from its dual (... the axial vector).
The algebraic bivector is not specific on shape; geometrically it is an amount of directed area in a specific plane, that's all.